Brush



Sept. D. B. JUSTICE 1,927,747

BRUSH Filed Nov. 2, 1931 ZSnnentor Javz'd ,B. Jmh'ce attorney;

. Patented Sept. 19, 1933 UNITED STATES PATENT OFFICE The present invention relates to brushes and has special reference to brushes of the type used in cleaning boiler tubes.

One of the objects of the invention resides in the provision of a brush which may be produced at a comparatively low cost and yet which will be strong and durable in operation. 7

Another object of the invention consists in constructing a brush in which new bristles can be installed from time to time without the use of special apparatus and without employing the services of skilled mechanics.

Other objects and advantages of the invention will be apparent from the following description when taken in connection with the accompanying drawing, in which Figure 1 is a perspective view of the completed brush showing in dotted outline a handle to which it may be applied.

Figure 2 is a perspective view of the body portion of the brush with the bristles removed.

Figure 3 is a perspective view of a wedge member forming a part of the means for securing the bristles in place, and,

Figure 4 is a transverse sectional view through the body of the brush and the windings before the latter are out.

Referring to the drawing in more detail the numeral 1 indicates a cylindrical body portion formed of Monel metal or the like and provided with a reduced end portion 2 adapted to be secured in the socket portion of a handle.

The body portion of the brush is provided with two diametrically disposed slots 3 and 4, which are arranged at right angles to each other and which extend from a point adjacent the threaded end 2 to the opposite end. These slots are adapted to receive the bristles which are preferably formed of wire, and which will now bedescribed.

The brush being primarily intended for the purpose of cleaning boiler tubes, the bristles 5 are of wire and are formed by winding about six turns of 49 strand aeroplane aileron wire about diametrically opposed sectors formed by the slots 3 and 4. The construction as just referred to is shown in Figure 4, and the dot and dash lines indicated in this figure represent the points at which the windings are to be cut by a chisel, hack saw, or the like, to provide tufts. The cutting of the windings allows the ends of the wire to project at right angles to the body portion of the brush and these free ends are then cut down to approximately the proper length and are thereafter ground down the desired amount by placing the partly finished brush in a grinder. It will be understood, of course, that the overall diameter of the brush when completed will be more or less the same diameter as the inside of the boiler tubes to 60 diameter and provided with threads 6 adapted to receive a knurled nut 7. Prior to applying the nut 6, however, it has been found desirable to insert in the slots 3-4 a filler member 8 which serves not only to press against the bristles which form the tufts but also to hold the sectors of the body portion in proper relationship when the mit 7 is screwed down into position. The inner edge of the nut also engages the outer strands of wire and thus assists in clamping them in position. This filler 8 and the nut 7 are, of course, applied to the end of the body portion of the brush after the windings of wire are inserted and prior to the cutting and grinding thereof. When the bristles are worn down from use s that the brush is rendered ineffective it is only' necessary to remove the nut '7, the filler 8, the old bristles and apply new windings as heretofore described. It will be apparent, therefore, that brushes of this type may readily be recon-,- ditioned or rebuilt without the use of special machinery or skilled mechanics and that the brush is therefore especially adapted for use on board ship and other places where special machinery is not always available.

In accordance with the patent statutes, I have described what I now believe to be the preferred form of the invention but inasmuch as various minor changes may be made in the details of the construction without departing from the spirit of the invention, it is intended that all such changes be included within the scope of the appended claims.

What I claim is:

1. A brush including a body portion provided with a diametrical slot therein, bristles disposed in said slot, a filler member seated in the outer end" of said slot, and a nut threaded onto the body portion for clamping the bristles between the end of the slot and one face of the nut.

2. A brush including a cylindrical body portion formed of solid sectors separated by communicating slots, bristles disposed in said slots, a filler member seated in the ends of said slots,

tion formed of solid sectors separated by communicating slots, wire bristles doubled upon themselves to provide pairs of angularly arranged tufts, said pairs of tufts being seated in the slots with the tufts of each pair extended outwardly through adjacent slots, a flller member seated in the outer ends of said slots, and securing means mounted on the end of the body portion.

5. A brush including a body portion provided with a diametrical slot therein, bristles disposed in said slot, a filler member seated in the outer end of said slot, and securing means on the end of the body portion for clamping the bristles between the end of the slot and one face of the securing means.

6. A brush including a cylindrical body portion formed of solid sectors separated by communicating slots, bristles disposed in said slots, a filler member seated'in the ends of said slots, and securing means on the end of the body portion and engaging said bristles.

DAVID B. JUSTICE. 

